Improvement in hemmers for sewing-machines



" n A, F. coLY.

Hemmer for Sewing-Machines. N0. '|59,39|.` I Patented Feb. 2,1875.

UNITED STATES PATENT QEEIGEo ASA E. coLBY, 0E BATH, MAINE, ASS'IGNOE To THE coLBY ADJUSTABLE HEMMEE COMPANY, or SAME PLAGE.

IMPROVEMENTIN HEMMERS FOR SEWING-MACHlNES.

Specioation forming part of Letters Patent No. 159,391, dated February 2, 1875; application led January 22, 1875.

To all whom it may concern:

Be it known that I, ASA F. GoLBY, of Bath, in the county of Sagadahoc and State of Maine, have invented a new and Improved Hemmin g Attachment for Sewing-Machines; and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings forming part of this specification, in which- Figure l is a perspective view of my improved hemmer; Fig. 2, a side elevation, and Fig. 3 a perspective view, of the support for the folding scroll.

Similar letters of reference in the accompanying drawings indicate corresponding parts.

My invention relates to improvements in so as to carry the scroll B in line with the needle and feed of the sewing-machine. The scroll is suspended in a horizontal position slightly below the arm A by means of a short arm, c, and is made with one side open its entire length, as Shown at d, the folding-lip e being formed on afront extension of the lower portion. This construction enables th hem- -mer to turn the hein in a perfect manner, and at the same time, by allowing the goods to pass freely, prevents the edge of the latter from stretching and from being retarded by the cross-seams. The front end of the main arm A is curved downward, and a short distance above its extreme end, upon the side opposite the scroll, is provided with a lateral arm, F. The end of this arm is bent or turned down to form an ear, g, parallel to the end of the main arm, which also forms an ear, g. Each of these ears is provided with two holes or slots, h h, one above the other, those in one being in line with those in the opposite ear, as shown. The main arm A, the scrollarm c, and the lateral arm F are all castor otherwise formed in one piece for convenience and economy of construction, and to prevent them from working loose or becoming detached from each other by long use. I is a horizontal plate connecting the bottoms or lower edges of the ears, and may be either cast with these parts or made in a separate piece, and secured thereto in any convenient manner.

The folding-plates are composed of two parts-first, a flat spring, J, from eight to ten inches in length, bent at or 'near the middle k, so that its ends are parallel to each other at about one-eighth of an inch apart, as described in my former patent. This spring is applied to the ears g by passing its upper leaf through the upper holes h h, as Shown, and its lower leaf bears upward with considerable force against the under side of the plate I. The second part of the folding plates is formed by a metal rod, L, passed through the lower holes h ofthe ears g, so as to lie between the leaves of the spring, with one end terminating just in iront of the bend 7c, and with its opposite end secured t-o the bent end m of the upper leaf, as shown in the draw- Y ings. The arm F is provided with a )set-screw, N, by which the folding-plates can be fastened in any position in the holes h h, and such plates are made smooth, and their edges are rounded to facilitate the passage of the goods.

The operation of the hemmer thus constructed is as follows: The attachment being applied to the sewing-machine, as previously described, the goods to be hemmed are first passed sidewise between the lower leaf of the spring and the rod L, then turned up over the end of the latter rod, between it and the upper leaf of the spring', being at the same time drawn sidewise into the scroll. In this position it is placed under the presser-foot of the sewing-machine and fed forward in the usual manner. The upward pressure of the lower leaf of the spring against the under surface of the cloth bears the latter against the plate I, and permits the cloth to pass freely through the foldiugplates between the extremities thereof and the scroll, thereby guiding the cloth against the arm A, and preventing it from being fulled by the feed of the machine. The pressure upon the cloth being near the main arm A, the cloth is held back slightly in line, or nearly so, with the arm and scroll, While that portion being folded and turned, together with that at the opposite end of the folding plates, is allowed to pass freely. The clot-l1 is therefore fed evenly through the folding scroll and without being fulled.

The Width of the hem depends upon the distance between the end of the arm A and the bend k of the folding plate, which can be Witnesses:

FRANK O. BUTTERFIELD, J oHN J. PIUKMAN. 

